Home / 21,561.80-29,744.39-12,603.45

Finding the Fourth Proportional to 21,561.80, 29,744.39 and 12,603.45

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Solution

The fourth proportional to 21,561.80, 29,744.39 and 12,603.45 is: 17,386.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.80 : 29,744.39 = 12,603.45 : x
  2. Step 2: Convert to fraction form
    21,561.80/29,744.39 = 12,603.45/x
  3. Step 3: Cross multiply
    21,561.80x = 29,744.39 × 12,603.45
  4. Step 4: Simplify right side
    21,561.80x = 374,881,783.42
  5. Step 5: Solve for x
    x = 374,881,783.42/21,561.80
  6. Step 6: Final answer
    x = 17,386.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.